Re: RFC: Btrfs snapshots feature for F13

from
[Jeff Garzik]

Subject:

Re: RFC: Btrfs snapshots feature for F13

From:

Jeff Garzik

Date:

Tue, 17 Nov 2009 02:48:50 -0500

On 11/17/2009 02:43 AM, nodata wrote:

Am 2009-11-17 01:55, schrieb Chris Ball:

Hi,
I've written up a draft of an F13 filesystem rollback feature using
Btrfs snapshots that are automatically created by yum:
https://fedoraproject.org/wiki/Features/SystemRollbackWithBtrfs
It'd be great to get feedback on whether this is the right idea, and
how exactly the UI interaction should work, before submitting this
formally.
Thanks!
- Chris.

So this will confuse things a lot if the user doesn't have only rpm
stuff on one partition, and everything else on another. This is
potentially a major risk. How would that be handled?

Mr. nodata,

As the URL notes under "Detailed Description," that is not handled at
all. It wraps all file I/O, yum or not, into the snapshot.

A bloody awful solution, especially when you consider that btrfs'
maintainer Chris Mason is adding support for real userland transactions
(via some additional ioctls).